Across |
1. | dark layer of the eye where blood vessels are found |
3. | region of the retina where there are no light receptors |
5. | coloured muscles that adjust the size of the pupil |
6. | used to adjust the thickness of the lens |
8. | the bending of light as it passes through the eye |
10. | an action that is rapid and involuntary |
12. | tough and white outer layer of the eye |
15. | the layer of cells containing light receptors |
16. | area of the retina with a high concentration of cones |
17. | the ciliary muscles relax when we are looking at these objects |
18. | shape of the len |
19. | these muscles contracts to dilate our pupils |